Improvement in saw-frames



. N. PETERS. PHOTO-UTNOGRAPNER. WASHINGTON. D C.

tnite tant stent' Gettin.

Letters Patent No. 92,767, dated July 20, 1869.

IMPRVEMENT IN SAW-FRAMES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern? Be it known that I, ABEL XVHITLOGK, ofDanbury, in the county of Fairfield, in the State of Connecticut, haveinvented a new and improved Saw-Frame; and I do hereby declare that thefollowing is a full and exact description thereof, reference `being hadto the accompanying drawings, and to the letters of refe-rence markedthereon. `\--\J The nature of my invention consists in providing mysaw-trame with a hinge and tension-arms. l By my hinge I easily adjustthe frame to receive saws of various sizes.

My tension-arms acting with the movement of the hinge, the pivot of thehinge becomes their fulcrum.

By the combined action of the hinge and tensionarms, I am able todispense with the brace used in the common saw-frame, and the longtension-rod.

To enable others skilled in the art to make'and to use my invention, Iwill proceed to describe its construction and operation.

I construct my saw-frame of" cast-iron, although it may be made of othermaterials.

I cast the saw-frame in two pieces, each piece having a Vcavity toreceive the ends of thesaw-blade, and

each piece having a part of the hinge; the cavity being near oneextreme, and the hinge near the other extreme of the pieces, and eachpiece having a tensionarm extending from near the hinge outward.

The tension-arms, when combined, answer also the purpose of one of thehandles; -the other handle being an extension on one piece below thecavity.

I attach the two parts by a suitable bolt or rivet through the hinge.

I attach the saw by bolts, rivets, or screws, and by means of a suitablebolt passing through the tensionarms, I adjust the tension of the saw.

When the parts of my frame and saw are all combined, it gives totheframe the appearance of au arch outward from the saw.

In most saw-frames in use, there is a brace-rod or stretcher ruimingfrom one part tothe other, parallel to the saw, intermediate between thesaw and the other extremes of the parts. This, brace or stretcher is inthe way, and proves aniuconvenient obstruction when needful to saw deepcuts through thick sticks.V

In my saw-frame my hinge and tension-arms overcome any need of suchbraceaod or stretcher, hence any obstruction from it.

K K', of the accompanying drawings, lshow the tension-arms, with a bolt,with screw on which the nut turns, for tension.

l) (t show the hinge, cnt transversely.

E F is a transverse cut through the cavity receiving the ends of thesaw-blade.

c l show a transverse 'cut through the saw-frame.

y A A show the two parts ot' saw-frame in combination.

B shows the saw in combination. H shows the hinge in combination.

Figure 1 shows the saw-frame combined with the` Witnesses:

DAVID B, BOOTH, I; N.. JnNNINGs.'

